ZW self-priming non-clogging sewage pump is also called solid-liquid pump or impurity pump. The hydraulic design of this series of pumps is unique. The impeller is shrunk in a separate leaf chamber. The pressurized water chamber is connected to the impeller chamber. When the impeller rotates, the liquid in the pump produces a strong axial vortex effect, causing the inlet to create a vacuum and the outlet to produce a lift. Therefore, impurities can be discharged from the pressurized water chamber, so its flow path is completely unblocked, and its sewage discharge effect is unmatched by other self-priming types. It has the advantages of convenient installation, use and movement, stable performance and extremely low maintenance rate, and is favored by users.
Measures to improve the self-priming performance of the self-priming non-clogging sewage pump:
(1) Increase the maximum circumferential velocity of the impeller outlet and the width of the impeller blade outlet. The maximum circumferential velocity of the impeller outlet can be achieved by increasing the impeller directly to increase the impeller speed. However, it is too large to ensure that increasing the maximum circumferential speed of the impeller outlet and the width of the impeller blade outlet will change the basic performance parameters of the pump such as flow and head. Therefore, the maximum circumferential speed of the impeller outlet and the width of the impeller blade outlet should be appropriately increased on the premise that the flow and head of the pump meet the requirements of use.
(2) The relationship between water storage and self-priming performance: When the water storage increases, the pump's self-priming height increases significantly, but when the water output is too large, it will slow down the process of gas discharge, that is, increase the self-priming time. Therefore, when the self-priming height requirement is high but the self-priming time requirement is not too strict, the water storage capacity of the pump can be increased, that is, the volume of the liquid storage chamber, but when the self-priming time requirement is strict, the liquid storage should be determined reasonably The size of the room.
(3) The relationship between the recirculation hole area and the self-priming time and height: within the critical recirculation hole area, when the recirculation hole area increases, the self-priming time decreases and the self-priming height decreases accordingly. Therefore, when the self-priming time requirement is strict and the self-priming height requirement is not high, the area of the recirculation hole can be appropriately increased, and vice versa, the area of the recirculation hole should be appropriately reduced.
(4) The gas-liquid separation acceleration device can be installed to accelerate the gas-liquid separation, that is, the self-priming time can be shortened. The simplest gas-liquid separation acceleration device is to add baffles in the gas-liquid separation chamber. As shown in Figure 1. Adding a baffle in the gas-liquid separation chamber has almost no effect on the self-priming height. Therefore, as long as the structure permits, a baffle should be installed in the gas-liquid separation chamber to accelerate the gas-liquid separation and shorten the self-priming time.
Improve the self-priming capacity of the self-priming non-clogging sewage pump:
(1) A suction valve is installed at the end of the suction pipe of the self-priming non-clogging sewage pump. The suction bottom valve is actually a check valve, which ensures that the water flow can only enter the suction pipe from the pool and cannot flow back. Therefore, if the suction pipe is filled with water, although the pump axis is higher than the working water level of the pool, it has a suction bottom. The function of the valve prevents the water in the suction pipe from flowing into the pool, so that the suction pipe is always filled with water, ensuring that the pump can be started automatically and quickly. The reliability of this water suction method is affected by the quality of the suction bottom valve. For example, if the water is not tightly closed or leaks, the water in the suction pipe will slowly flow into the pool. After a long time, there will be no water in the suction pipe, causing the water pump to start. Manual irrigation is required (public account: pump housekeeper).
(2) The self-priming non-clogging sewage pump reduces the bends, drop height and horizontal distance of the inlet pipe.
(3) The self-priming non-clogging sewage pump is equipped with a suction tank before the pump. This method requires a suction tank to be installed on the suction pipe of the water pump. Before the first operation of the pump, the tank should be filled with water manually. After the first operation is stopped, because the height of the water inlet pipe of the suction tank is higher than the water level in the pipe, although The water level in the pool is lower than the water level in the tank, and the water in the tank will not flow back into the pool. Therefore, a certain amount of water can be stored in the suction tank, and because of the height of the outlet pipe of the suction tank (that is, the suction pipe of the water pump) It is lower than the height of the water surface in the pipe, so it can ensure that the suction pipe of the water pump is filled with water. When the water pump is running again, the water in the water tank is pumped away by the water pump, and negative pressure appears in the tank. The water in the pool is supplemented by atmospheric pressure. In the suction tank, through the suction tank in the pool.
(4) The self-priming sewage pump is equipped with a vacuum pump on the suction pipe of the water pump. Before the water pump is started, the vacuum pump is started first, so that the suction pipe of the water pump is filled with water first to ensure that the pump starts automatically and quickly. This type of water absorption requires a complete automatic control system to ensure normal operation.
